The problem Brown was trying to solve was an age-old one. He wanted to create a computer that would pass the Turing test, computer scientist Alan Turing's famous challenge to have a computer give answers to questions that are indistinguishable from a human being's answers. So far, no computer has ever passed the test, though some attempts have led to funny results.

So Brown fed Watson the contents of a site called Urban Dictionary, thinking that would be a good way to teach it to understand idioms and slang like "OMG." He didn't realize that Urban Dictionary is filled with profanity and sexual innuendo.

Brown eventually created a filter that cleaned up Watson's potty mouth and the supercomputer could safely appear on national television. In 2011, Watson did so, winning on the game show "Jeopardy" against human competitors by a landslide.